Oil-pump



(No Model.)

R. 0. GRAHAM.

( OIL PUMP.

No. 527,421. Patented Oct. 16,1894.

z ucnms PEYERS co, Mom-Limo WASHINGTON u n UNITED STATES I PATENT OFFICE.

ROBERT O. GRAIIAM, OF BLOOMINGTON, ILLINOIS.

OIL-PUMP.

SPECIFICATION forming part of Letters Patent No. 527,421, dated October 16, 1894.

Application filed April 17 1894.

To all whom it may concern:

Be it known that I, ROBERT O. GRAHAM, a citizen of the United States, and a resident of Bloomington, in the county of McLean and State of lllinois, have invented certain new and useful Improvements in Oil-Pumps; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to that class of pumps designed for filling lamps and other vessels from cans or other receptacles.

In filling lamps and other vessels, made of an opaque material, it frequently happens that fluid overflows the same, owing to the inability of the operator to ascertain when the proper level has been reached.

The object of the present invention is to provide an improved pump by which any surplus or excess of oil fed to the lamp, after the proper level has been reached, will be sucked back into the can or tank as fast as fed thereto, thus preventing overflowing of the same and r the consequent waste ofthe fluid and the objections attending such overflowing.

In an application filed by me April 30, 1894:, Serial No. 509,543, I have shown an oil pump in which two pump barrels are employed in which are located two pistons, the

rods of which are connected together so as to move in unison. One of these barrels has connected with it a filling pipe and the other a suction pipe, the nozzles of which converge toward each other, the construction being such that oil is pumped into a lamp or other object by one barrel and any surplus sucked back simultaneously by the other barrel.

The invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings: Figure 1 is a perspective view of a pump constructed in accordance with myinvention. Figs. 2 and 3, are longitudinal views taken, respectively, through the filling and suction pipes.

In the said drawings the reference nu- Serial No. 507.892. (No model.)

meral 2 designates a cylinder, constituting the pump barrel, closed at top and bottom. Connected with this cylinder, near its upper end is a downwardly extending filling pipe 1, having connected at its lower end a valve box or casing 1, having an opening in each end. The opening in the lower end of said box, communicates with the exterior thereof, while with the upper opening is an upwardly extending pipe 4, formed witha goose neck 6. Located in the valve box or casing are two oppositely working valves 3 and 5, the valve 3, opening on the down stroke ofthe piston, allowing oil in the vessel or tank in which the pump is placed, to enter, and closing on the upstroke of the piston. Valve 5 closes on the down stroke of the piston and opens on the upstroke. Located at the lower end of the cylinder is a valve box or casing 7, having an opening at its upper end communicating with the exterior, and an opening at the lower end communicating with an upwardly extending suction pipe 8, formed with a goose neck 9. Located in this valve box or casing are two oppositely opening valves 12 and 13.

The numeral 14 designates a piston, 15 its rod and 16 an operating handle.

The two goose necks converge toward each other as seen in Fig. 1, and are adapted to be inserted in the filling opening of a lamp or other object.

The operation will be readily understood. The pump is placed in a tank or other vessel and the two goose-necks are inserted in the mouth or filling opening of a lamp. The piston is now reciprocated and the lamp is filled through pipe 1. When the oil in the lamp reaches the nozzles of the goose-necks, any surplus oil will be sucked back into the barrel through pipe 8.

Having thus described my invention, what I claim is- In a pump of the character described, the combination with the cylinder and the solid piston, of the downwardly extending filling pipe, the valve box secured to the lower end thereof having an opening communicating with the exterior, the oppositely opening valves located in said box, the upwardly extending pipe connected with said box, provided with a goose-neck, the valve box or In testimony that I claim the foregoing as casing; connected with the cylinder having my'own I- have herenntoa'ffixed'my signature an ope-ni'ngcommu'ni'cating with theexterior, in presence of two witnesses.

the oppositely opening valves located in said ROBERT O. GRAHAM. 5 box, and the upwardly extending suction Witnesses:

pipe connected with said box and formed KATE W. HAMILTON,

with a goose neck, substantially ass-described; MARY BUoKLEY. 

